The chemical formaldehyde is used to preserve bodies. ... Formaldehyde changes the tissue on a molecular level so that the bacteria can't feed on the tissue.

When dissolved in water it is called formalin, which is commonly used as an industrial disinfectant, and as a preservative in funeral homes and medical labs. It can also be used as a preservative in some foods and in products, such as antiseptics, medicines, and cosmetics.

Pure Chemicals Co. - Offering Formaldehyde Solution 37-41% W/v Ar 500ml, 500 Ml .

Formalin is a 40% solution of formaldehyde in water.

FORMALDEHYDE SOLUTION LR 37 41% WV